LoadRunner参数和变量之间的转换

这是用LoadRunner自定义监控Tomcat的脚本为基础而写的脚本.阐述了参数相互之间以及参数与变量之间复制传递原理.下面的代码注释是按照本身的理解写的,正确性不必定保证.

 

Action()
{
    //定义三个字符数组用于条件判断
    char jFM[100];
    char jTM[100];
    char jMM[100];

    //必需要预先声明数据转换函数,不然获得的监控结果不正确.
    double atof(const char *string);

    //如下三个web_reg_save_param负责从Tomcat中抓取监控数据
    web_reg_save_param("JVM_Free_Memory",
                "LB=Free memory:",
                "RB=MB",
                "ORD=1",
                LAST);
    web_reg_save_param("JVM_Total_Memory",
                "LB=Total memory:",
                "RB=MB",
                "ORD=1",
                LAST);
    web_reg_save_param("JVM_Max_Memory",
                "LB=Max memory:",
                "RB=MB",
                "ORD=1",
                LAST);

    //设定监控事务
        lr_start_transaction("Status");
    //登录Tomcat
    web_set_user("admin", "admin", "localhost:8080");
    //Tomcat监控URL
    web_url("status",
            "URL=http://localhost:8080/manager/status",
            "Resource=0",
            "RecContentType=text/html",
            "Snapshot=t1.inf",
            "Mode=HTML",
            LAST);

        lr_end_transaction("Status", LR_PASS);
    //经过用户自定义监控Tomcat_JVM的使用状况
    //lr_user_data_point("JVM Free Memory", atof(lr_eval_string("{JVM_Free_Memory}")));
    //lr_user_data_point("JVM Total Memory", atof(lr_eval_string("{JVM_Total_Memory}")));
    //lr_user_data_point("JVM Max Memory", atof(lr_eval_string("{JVM_Max_Memory}")));

    lr_output_message("**********************************");

    //打印监控值
        lr_output_message(lr_eval_string("{JVM_Free_Memory}"));
        lr_output_message(lr_eval_string("{JVM_Total_Memory}"));
        lr_output_message(lr_eval_string("{JVM_Max_Memory}"));

    lr_output_message("**********************************");

    //将参数的值保存在另一个参数中(其实从运行原理上说,相似于C++中的引用)
    lr_save_string(lr_eval_string("{JVM_Free_Memory}"), "JFreeMem");
    lr_save_string(lr_eval_string("{JVM_Total_Memory}"), "JTotalMem");
    lr_save_string(lr_eval_string("{JVM_Max_Memory}"), "JMaxMem");

    lr_output_message("**********************************");

    //打印"引用"中的值
    lr_output_message(lr_eval_string("{JFreeMem}"));
    lr_output_message(lr_eval_string("{JTotalMem}"));
    lr_output_message(lr_eval_string("{JMaxMem}"));

    lr_output_message("**********************************");

    //将参数值赋给变量(字符串数组)
    strcpy(jFM, lr_eval_string("{JVM_Free_Memory}"));
    strcpy(jTM, lr_eval_string("{JVM_Total_Memory}"));
    strcpy(jMM, lr_eval_string("{JVM_Max_Memory}"));

    //进行逻辑判断
    if (strcmp(jFM, "") == 0 && strcmp(jTM, "") == 0 && strcmp(jMM, "") == 0) {
        lr_output_message("%s", "无参数");
    } else {
        lr_output_message("%s", "有参数");
    }

    //输出实际值
    lr_output_message("**********************************");
    lr_output_message("%s", jFM);
    lr_output_message("%s", jTM);
    lr_output_message("%s", jMM);
    lr_output_message("**********************************");

    //将变量值保存在另一个参数中(其实从运行原理上说,相似于C++中的引用)
    lr_save_string(jFM, "JFreeMem");
    lr_save_string(jTM, "JTotalMem");
    lr_save_string(jMM, "JMaxMem");
    lr_output_message("**********************************");

    return 0;
}